Drug interactions
Fentanyl intranasal + Loperamide
Severity: Moderate
Fentanyl intranasal and Loperamide: moderate interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Both are opioid receptor agonists, and loperamide at high doses or with increased absorption may add to CNS and respiratory depression. Fentanyl also adds to constipating effects.
What this interaction means in plain words
Fentanyl intranasal and Loperamide can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Why it happens
Additive opioid receptor agonism, with possible central effects if loperamide exposure rises.
What to do
Use standard loperamide doses only and monitor for sedation and respiratory depression. Monitor for constipation.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Loperamide
Frequently asked questions
Can I take Fentanyl intranasal with Loperamide?
MediHelp rates the interaction as moderate. Fentanyl intranasal and Loperamide can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Both are opioid receptor agonists, and loperamide at high doses or with increased absorption may add to CNS and respiratory depression. Fentanyl also adds to constipating effects.
How serious is the interaction between Fentanyl intranasal and Loperamide?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Use standard loperamide doses only and monitor for sedation and respiratory depression. Monitor for constipation.
What other medicines interact with Loperamide?
MediHelp also lists interactions of Loperamide with, for example, Amiodarone, Amisulpride, Anagrelide. The full list is on the Loperamide page.
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